Arc-light.



W.l E. BROWN s: L. 'ofmmjm ARG LIGHT. i APPLICATION FILED SEPT. 15, 1911.

Patened Aug. i9, 1913.

W/T/VEJJJ.

. UNITED vsasarns entrai WILLIAM n. BROWN, or mantengan, Wisconsin, aren :envite c. sentenze, or 'rn KONSHA, MICHIGAN, .essrenons or cnn-'ritten tro verzetten M. sein-water, on

MILWAUKEE, WISCONSIN.

Specification of Letters CPatent.

To all whom t may concern:

Be it known that we, WILLIAM E. BROWN, a citizen of the United States, residing in Milwaukee, in the county of Milwaukee and State of Wisconsin, and LEWIS C. GRANGER, a citizen of the United States, residing in Tekonsha, in the county of Calhoun and State of Michigan, have invented new and useful improvements in AArc-Lights, of which the following is a description, reference being had to the accompanying drawings, which are a part of this speciiication.

This invention has for its object to pro- Vvide an arc light particularly designed for use in the operation of moving picture machines, but capable of use generally.

A further object of the invention isto avoid the formation of a shadow in the projection from such are light which is due to carhonsbeing arranged practically in alinement, and this shadow. is obviated under the present invention by positioning the carbons at an angle to each other, preferably at an angle of degrees.

nother object of this invent-ion is to provide an arc light with the carbone disposed at an angle to each other and provided with means for independently adjusting the carbons toward or aivay from each other and turning them to produce uniform consumption thereof.

Vith the above and other objects in view the invention consists in the arc light herein clairr And sii equivalents.

lieferung to the accompanying drawings in which like characters of reference indi-Y cate the same parts in different views: Fig

ure 1 is a sectional elevation of an arc lighty constructed in accordance with` this invention; and Fig. 2 is a sectional view thereof on the plane of line 2 2 of Fig. l.

In these drawings 10 indicates a frame having a horizontal and a vertical portion substantially alike, the horizontal portion.

having a 'pair of rings 11 and 12 formed thereon, the former having a shouldered insulatin bushing 13 fitting therein, with a gear w eel 14 fixed on its projecting unshouldered end by means of a set screw, and the ring 12 having an insulating bushing 15 fitting Within it and containing a double flanged nut 16, with the flanges thereof engaging the bushing 15, and both. held firmly in place within the ring 12 by means of a set screw 17. The insulating sleeve 15 may be ARQ-LIGHT.

atented Ang, it 21., 1913.

Application lcd September 15,;12'11. l Serial 11o. 642,434.

formed A.in half sections to tit. around the tiange nut 16 between the flanges thereof, or one of the flanges of the nut may be turned up after the bushing is in place, though any" 'desirable means for assembling the bushing on the nut between the tianges may be resorted to. The nut 16 has an arm 18 projecting from it. andl containing a binding post 19 to formons terminal of the lamp. A metal tube 20 is threaded Within the nut 16 and has a key or feather 21 by which it is splined within the insulating bushing 18 so as to be rotated by the gear Wheel 14 and fed longitudinally by its turning Within the stationary nut. This metal tuhe 20 is split at its front end and is tapered to t within a tapering collar 22 threaded thereon, so that a carbon rod 23, which fits within the tube 20, may he tightly clamped by the cooperation of the tapering portions 4of the collar 22 and the split endof the tube. A shaft 24 is journaled through the frame be neath the tube 2O and has a sleeve 25 loosely mounted thereon, carrying a gear wheel 23, meshing With the gear Wheel 111, and an adjusting wheel 27, by means of which the parts'may be turned, the wheel 26 being di? rect-ly turned by the Wheel 2'( and serving to turn the gear Wheel 14, with the consequent turning and adjustment of the carbon. The shaft 24 also has an adjusting `wheel 28 mounted on its rear end, and at its.' front end it is provided with a bevel gear 29, meshing with a bevel gear 30 en the upper end of a vertical shaft 31, whieh carries a gear wheel 26 on its lower end icorrewonding with the gear wheel for ac a vertical carbon 23 through mechaw in. corresponding to the mechanism just described for operating ycarbon 23 and which mechanism has its parts vdesignated by the same reference characters, with the exception that they are primed.,

From the foregoing it will he seen that the two carbone are adjustable independently from their respective adjusting Wheels 27 and 28, and each is completely insulated from the rest ofthe mechanism. The operator is therefore enabled to adjust the carbons as desired, both by moving them longitudinally and by turning them to make their consumption uniform. i

In the ordinary arc lights for moving pic. ture machines, the cai-bons are set in alinement With each other and slightly inclined.

se'y

This has been open to objection by reason of the fact that a shadow 'is produced which causes the picture to become light and dark in parts. By arranging the carbons at an angle to each other, with the horizontalpositive carbon with its .cavity or pit in posltion A lens, the light is'niuch more intense and is" to turn its light directly to the condenser.

free from shadow. y A

The invention ,gives an ordinary light with 7 to l1 amperes, .While the ordinary light for lnovingpicture apparatus requires from 40 to 60 amperes., Y n f It is not necessarythat the carbons Abe direct-ly at right angles to each other, forfmost any angle will do, but the nearer a right angle is approached the better the results are accom lished.

VVhlle the invention is particularly adapted for moving picture apparatus and spot.

'lights7 yet it may be utilized otherwise.

v -Vhat We claim as new and desire to secure by Letters Patent, is:

y 1. An are light, comprising a frame, insulating bushings fitting in the frame, a carbon holding tube having a threaded connecthreaded through the nut and'splined to the rotatable insulating bushing, a gear Wheel l on the rotatable l:insulating bushing, and an adjusting wheel having a driving connection with the gear Wheel for turning the same to cause the carbon holding tube to l turn and adjust itself vlongitudinally through the nut. v

3. An are light, comprising a frame, carj bon holders thereon, arranged at approximately vright angles to each other and each comprising a pair of insulating bushings,

one fixed Within the frame and theother ro#- tatable Withiny the frame', a flanged nut contained within the fixed insulating bushing, a carbon holding tube threaded through the nut and splined Within the rotatable insulating bushing, a gear Wheelv carried by the rotary insulating bushing, and means for independently turning and adjusting the carbon holders, comprising a shaft journaled through the frame, a sleeve mounted on the shaft, a ge'ar Wheel on the sleeve-meshing l WithV the gear Wheel of one of the carbon holders, an adjusting 'Wheel on the sleeve, an adjusting Wheelon theshaft, a second shaft journaled'in the frame, gear yconnection between thetwo shafts, and agear wheel on the second shaft meshin ywith the gear Wheel ,of the other carbon iolder.

' .Intestimony whereof, We aflix our signatures,'in presence of two Witnesses.

VVILLIAME. BROWN. j LEWIS C. GRANGER. Vit-nesses to W. E. B. :l

KATHERINE Hon'r, R. S. CALDWELL. Witnesses to L. C. G.:

w v F. ELTING,

. ,j F. M. PERINE. 

